Blocking unicast calls

[Yves Langisch]

Hi,

I have a kernel module that acts as a Generic Netlink server. In the 
user space I have a daemon which receives Netlink unicast messages from 
the kernel module using the libnl library.

What I'd like to know is if it's possible to send a Netlink message in a 
blocking manner and to get a direct result back from the daemon? As far 
as I understand the Netlink concept it is a bus-like system and thus I'm 
not sure if it's possible at all.

Currently my call to send the message to the user space is as follows:

...
rc = genlmsg_unicast(skb, daemon_pid);
...

Thanks
Yves

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